How can I change the cPanel release tier from the command line?

Question

How can I change the cPanel release tier from the command line?

Answer

WHMAPI1 has a function for this: set_tier

API Documentation: Update cPanel & WHM release tier 

You can read about the different tier options here:

Product Versions and the Release Process: Release tiers

If you wish to use the "current" tier, for example, you would run the following command:

# whmapi1 set_tier tier=current